Question : PL/SQL - Remove comma from address field

I have a table with records which inclue the field, 'addr_1', in which there may be data in 'addr_1'  as in  these records (only field 'addr_1' is listed, but each record contains several other fields):

    addr_1
238 State St
1345 Maple St, #29
2525 Elm St, SE
5543 Oak St, SE, #12A

I want to do this in the context of a SELECT query. I need to know how to get PL/SQL to first look at each field 'addr_1' in each record in the entire table and see whether field 'addr_1' it has no commas, or a comma (or more than one comma) in it the 'addr_1' field in each record in the table.

If field 'addr_1' does not have a comma in that record, then leave field 'addr_1' as it is in that record.
If field 'addr_1 does have a comma (or more than one comma)in that record, then simply delete the comma(s) in 'addr_1' for that record and leave the rest of the text in the field as it is.

For the above data, the result would look like this:

     addr_1
238 State St
1345 Maple St #29
2525 Elm St SE
5543 Oak St SE #12A

Thanks!

Answer : PL/SQL - Remove comma from address field

oops... if you only want to select, then

select replace(addr_1, ',', '') as addr_1, othercol1, col2
from tbl